Info: Running post-routing legalisation...
terminate called after throwing an instance of 'nextpnr_himbaechel::assertion_failure'
  what():  Assertion failure: unimplemented! (/usr/src/debug/nextpnr-himbaechel-git/nextpnr-himbaechel/himbaechel/uarch/xilinx/fasm.cc:326)
Command terminated by signal 6